相关实验视频

Updated: Sep 16, 2025

Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow

Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow

Published on: April 18, 2019

防水共价有机框架用于固体阶段的甲酸微提取

Mei Yang¹, Pengling Zhang¹, Qidi Kong¹

¹School of Environmental and Material Engineering, Yantai University, Yantai, 264005, Shandong, China.

Mikrochimica acta

|July 9, 2025

概括

疏水性共价有机框架 (COF) 已开发用于在茶中使用固相微提取 (SPME) 检测敏感的甲类杀虫剂. 这种先进的材料为可靠的食品安全监测和农药残留分析提供了有前途的工具.

科学领域:

材料科学材料科学材料科学
分析化学分析化学
环境科学环境科学

背景情况:

对食品中的农药残留物分析对于公共卫生至关重要.
开发敏感和选择性的提取材料对于准确的检测至关重要.
联有机框架 (COF) 显示出作为先进吸收材料的潜力.

研究的目的:

为了合成和描述用于农药提取的新型疏水性COF.
开发一种固态微提取 (SPME) 方法来检测茶中的甲状腺.
评估基于COF的SPME的性能,用于食品安全分析.

主要方法:

合成基于三烯 (BTT) 的疏水性COF (BTT-TAPA-COF和BTT-TAPB-COF).
在SPME应用中,将COF涂在不钢纤维上.
将SPME与气相色谱-质谱法 (GC-MS) 结合起来用于甲状腺分析.
优化SPME参数,包括直接浸泡 (DI-SPME) 与头部空间 (HS-SPME) 和粘合剂选择.

主要成果:

合成的COF具有很高的孔隙性 (高达1531 m2/g) 和强大的疏水性 (接触角度>118°).
使用COF涂层纤维的DI-SPME实现了比HS-SPME高出200倍的提取效率.
开发的方法显示出极好的线性 (R2>0.9852),低检测极限 (LODs低至0.002 ng·L-1),以及良好的恢复 (81.1%125.8%).
在茶样中检测到双和λ-cyhalothrin在环境相关的度.

结论:

疏水性BTT-COF是高性能SPME的有效材料.
开发的基于COF的SPME-GC-MS方法能够灵敏且可靠地确定茶中的铁.
这种方法对常规食品安全监测和农药残留分析具有重大前景.

关键词:

协价有机框架协价有机框架化异环化合物化异环化合物气体染色学-质谱学-质谱学皮雷类的皮雷类.固体阶段微提取的微提取方法

更多相关视频

Investigating Long-Distance Transport of Perfluoroalkyl Acids in Wheat via a Split-Root Exposure Technique

Investigating Long-Distance Transport of Perfluoroalkyl Acids in Wheat via a Split-Root Exposure Technique

Published on: September 28, 2022

Preparation of Hydrophobic Metal-Organic Frameworks via Plasma Enhanced Chemical Vapor Deposition of Perfluoroalkanes for the Removal of Ammonia

Preparation of Hydrophobic Metal-Organic Frameworks via Plasma Enhanced Chemical Vapor Deposition of Perfluoroalkanes for the Removal of Ammonia

Published on: October 10, 2013

相关概念视频

Extraction: Advanced Methods

Extraction: Advanced Methods

Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...